Which of these has some mechanical energy?

a: an atom

b: heat inside earth

c: a book on a shelf

d: a fire from a lit match

Which of the following substances is a mixture? a. Baking soda b. Gasoline c. Salt d. Sugar

Two balls, each with a mass of 0.5 kg, collide on a pool table. Is the law of conservation of momentum satisfied in this collision? Explain why or why not.

A ring made of gold is heated and then hammered into a flat, coin-like shape. Is this a physical change? Explain.

What causes a tsunami to grow taller as it reaches the shore?

Neglecting air resistance, once a tossed ball leaves your hand

Convert 4,200 decigrams to grams

A beam of light is incident upon a flat piece of glass (n = 1.50) at an angle of incidence of 30.00. Part of the beam is transmitted and part is reflected. Determine the angle between the reflected and transmitted rays

A 29 foot ladder leans against a building so that the angle between the ground and the ladder is 75 ∘. How high does the ladder reach up the side of the building? Round to 2 decimal places.

What is a difference between an isotope and a ion

2. An airplane travels 335 miles in 45 minutes. How fast does it travel? How fast is that in km/hr?